From 0346d5174eb0ce553cda977d91dd6cf61b7ffe82 Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Sat, 19 Mar 2011 22:28:32 -0400
Subject: initial check-in

---
 Makefile  |  22 +++++++++
 main.c    |  98 +++++++++++++++++++++++++++++++++++++++
 malloc.c  | 154 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 pthread.c |  97 +++++++++++++++++++++++++++++++++++++++
 regex.c   |  30 ++++++++++++
 stdio.c   |  35 ++++++++++++++
 string.c  |  68 +++++++++++++++++++++++++++
 utf8.c    |  80 ++++++++++++++++++++++++++++++++
 8 files changed, 584 insertions(+)
 create mode 100644 Makefile
 create mode 100644 main.c
 create mode 100644 malloc.c
 create mode 100644 pthread.c
 create mode 100644 regex.c
 create mode 100644 stdio.c
 create mode 100644 string.c
 create mode 100644 utf8.c

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..7769ef5
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,22 @@
+
+SRCS = $(sort $(wildcard *.c))
+OBJS = $(SRCS:.c=.o)
+
+CFLAGS = -Os -D_XOPEN_SOURCE=700
+LDFLAGS = -static
+LIBS = -lpthread -lrt -lpthread
+
+
+all: libc-bench
+
+clean:
+	rm -f $(OBJS) libc-bench
+
+test: all
+	./libc-bench
+
+libc-bench: $(OBJS)
+	$(CC) $(LDFLAGS) -o $@ $(OBJS) $(LIBS)
+
+%.o: %.c
+	$(CC) $(CFLAGS) -c -o $@ $<
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..12bb541
--- /dev/null
+++ b/main.c
@@ -0,0 +1,98 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include <sys/wait.h>
+
+void print_stats(struct timespec tv0)
+{
+	FILE *f;
+	char buf[256];
+	struct timespec tv;
+	int maj, min, in_heap=0;
+	unsigned long l;
+	size_t vm_size=0, vm_rss=0, vm_priv_dirty=0;
+
+	clock_gettime(CLOCK_REALTIME, &tv);
+	tv.tv_sec -= tv0.tv_sec;
+	if ((tv.tv_nsec -= tv0.tv_nsec) < 0) {
+		tv.tv_nsec += 1000000000;
+		tv.tv_sec--;
+	}
+
+	f = fopen("/proc/self/smaps", "rb");
+	if (f) while (fgets(buf, sizeof buf, f)) {
+		if (sscanf(buf, "%*lx-%*lx %*s %*lx %x:%x %*lu %*s", &maj, &min)==2)
+			in_heap = (!maj && !min && !strstr(buf, "---p") && (strstr(buf, "[heap]") || !strchr(buf, '[')));
+		if (in_heap) {
+			if (sscanf(buf, "Size: %lu", &l)==1) vm_size += l;
+			else if (sscanf(buf, "Rss: %lu", &l)==1) vm_rss += l;
+			else if (sscanf(buf, "Private_Dirty: %lu", &l)==1) vm_priv_dirty += l;
+		}
+	}
+	if (f) fclose(f);
+	printf("  time: %ld.%.9ld, virt: %zu, res: %zu, dirty: %zu\n\n",
+		(long)tv.tv_sec, (long)tv.tv_nsec,
+		vm_size, vm_rss, vm_priv_dirty);
+}
+
+int run_bench(const char *label, size_t (*bench)(void *), void *params)
+{
+	struct timespec tv0;
+	pid_t p = fork();
+	if (p) {
+		int status;
+		wait(&status);
+		return status;
+	}
+
+	puts(label);
+	clock_gettime(CLOCK_REALTIME, &tv0);
+	bench(params);
+	print_stats(tv0);
+	exit(0);
+}
+
+#define RUN(a, b) \
+	extern size_t (a)(void *); \
+	run_bench(#a " (" #b ")", (a), (b))
+
+int main()
+{
+	RUN(b_malloc_sparse, 0);
+	RUN(b_malloc_bubble, 0);
+	RUN(b_malloc_tiny1, 0);
+	RUN(b_malloc_tiny2, 0);
+	RUN(b_malloc_big1, 0);
+	RUN(b_malloc_big2, 0);
+	RUN(b_malloc_thread_stress, 0);
+	RUN(b_malloc_thread_local, 0);
+
+	RUN(b_string_strstr, "abcdefghijklmnopqrstuvwxyz");
+	RUN(b_string_strstr, "azbycxdwevfugthsirjqkplomn");
+	RUN(b_string_strstr, "aaaaaaaaaaaaaacccccccccccc");
+	RUN(b_string_strstr, "aaaaaaaaaaaaaaaaaaaaaaaaac");
+	RUN(b_string_strstr, "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaac");
+	RUN(b_string_memset, 0);
+	RUN(b_string_strchr, 0);
+	RUN(b_string_strlen, 0);
+
+	RUN(b_pthread_createjoin_serial1, 0);
+	RUN(b_pthread_createjoin_serial2, 0);
+	RUN(b_pthread_create_serial1, 0);
+	RUN(b_pthread_uselesslock, 0);
+	RUN(b_pthread_createjoin_minimal1, 0);
+	RUN(b_pthread_createjoin_minimal2, 0);
+
+	RUN(b_utf8_bigbuf, 0);
+	RUN(b_utf8_onebyone, 0);
+
+	RUN(b_stdio_putcgetc, 0);
+	RUN(b_stdio_putcgetc_unlocked, 0);
+
+	RUN(b_regex_compile, "(a|b|c)*d*b");
+	RUN(b_regex_search, "(a|b|c)*d*b");
+	RUN(b_regex_search, "a{25}b");
+}
+
diff --git a/malloc.c b/malloc.c
new file mode 100644
index 0000000..79cc88b
--- /dev/null
+++ b/malloc.c
@@ -0,0 +1,154 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <pthread.h>
+
+size_t b_malloc_sparse(void *dummy)
+{
+	void *p[10000];
+	size_t i;
+	for (i=0; i<sizeof p/sizeof *p; i++) {
+		p[i] = malloc(4000);
+		memset(p[i], 0, 4000);
+	}
+	for (i=0; i<sizeof p/sizeof *p; i++)
+		if (i%150) free(p[i]);
+	return 0;
+}
+
+size_t b_malloc_bubble(void *dummy)
+{
+	void *p[10000];
+	size_t i;
+	for (i=0; i<sizeof p/sizeof *p; i++) {
+		p[i] = malloc(4000);
+		memset(p[i], 0, 4000);
+	}
+	for (i=0; i<sizeof p/sizeof *p-1; i++)
+		free(p[i]);
+	return 0;
+}
+
+size_t b_malloc_tiny1(void *dummy)
+{
+	void *p[10000];
+	size_t i;
+	for (i=0; i<sizeof p/sizeof *p; i++) {
+		p[i] = malloc((i%4+1)*16);
+	}
+	for (i=0; i<sizeof p/sizeof *p; i++) {
+		free(p[i]);
+	}
+	return 0;
+}
+
+size_t b_malloc_tiny2(void *dummy)
+{
+	void *p[10000];
+	size_t i;
+	for (i=0; i<sizeof p/sizeof *p; i++) {
+		p[i] = malloc((i%4+1)*16);
+	}
+	for (i=1; i; i = (i+57)%(sizeof p/sizeof *p))
+		free(p[i]);
+	return 0;
+}
+
+size_t b_malloc_big1(void *dummy)
+{
+	void *p[2000];
+	size_t i;
+	for (i=0; i<sizeof p/sizeof *p; i++) {
+		p[i] = malloc((i%4+1)*16384);
+	}
+	for (i=0; i<sizeof p/sizeof *p; i++) {
+		free(p[i]);
+	}
+	return 0;
+}
+
+size_t b_malloc_big2(void *dummy)
+{
+	void *p[2000];
+	size_t i;
+	for (i=0; i<sizeof p/sizeof *p; i++) {
+		p[i] = malloc((i%4+1)*16384);
+	}
+	for (i=1; i; i = (i+57)%(sizeof p/sizeof *p))
+		free(p[i]);
+	return 0;
+}
+
+
+#define LOOPS 100000
+#define SH_COUNT 300
+#define PV_COUNT 300
+#define MAX_SZ 500
+#define DEF_SZ 40
+
+struct foo {
+	pthread_mutex_t lock;
+	void *mem;
+};
+
+static unsigned rng(unsigned *r)
+{
+	return *r = *r * 1103515245 + 12345;
+}
+
+
+static void *stress(void *arg)
+{
+	struct foo *foo = arg;
+	unsigned r = (unsigned)pthread_self();
+	int i, j;
+	size_t sz;
+	void *p;
+
+	for (i=0; i<LOOPS; i++) {
+		j = rng(&r) % SH_COUNT;
+		sz = rng(&r) % MAX_SZ;
+		pthread_mutex_lock(&foo[j].lock);
+		p = foo[j].mem;
+		foo[j].mem = 0;
+		pthread_mutex_unlock(&foo[j].lock);
+		free(p);
+		if (!p) {
+			p = malloc(sz);
+			pthread_mutex_lock(&foo[j].lock);
+			if (!foo[j].mem) foo[j].mem = p, p = 0;
+			pthread_mutex_unlock(&foo[j].lock);
+			free(p);
+		}
+	}
+	return 0;
+}
+
+size_t b_malloc_thread_stress(void *dummy)
+{
+	struct foo foo[SH_COUNT] = {0};
+	pthread_t td1, td2;
+	void *res;
+	int i;
+
+	pthread_create(&td1, 0, stress, foo);
+	pthread_create(&td2, 0, stress, foo);
+	pthread_join(td1, &res);
+	pthread_join(td2, &res);
+	return 0;
+}
+
+size_t b_malloc_thread_local(void *dummy)
+{
+	struct foo foo1[SH_COUNT] = {0};
+	struct foo foo2[SH_COUNT] = {0};
+	pthread_t td1, td2;
+	void *res;
+	int i;
+
+	pthread_create(&td1, 0, stress, foo1);
+	pthread_create(&td2, 0, stress, foo2);
+	pthread_join(td1, &res);
+	pthread_join(td2, &res);
+	return 0;
+}
diff --git a/pthread.c b/pthread.c
new file mode 100644
index 0000000..33ab9ec
--- /dev/null
+++ b/pthread.c
@@ -0,0 +1,97 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <pthread.h>
+#include <unistd.h>
+
+void *emptyfunc(void *dummy)
+{
+	return 0;
+}
+
+size_t b_pthread_createjoin_serial1(void *dummy)
+{
+	size_t i;
+	pthread_t td;
+	for (i=0; i<2500; i++) {
+		pthread_create(&td, 0, emptyfunc, 0);
+		pthread_join(td, &dummy);
+	}
+	return 0;
+}
+
+size_t b_pthread_createjoin_serial2(void *dummy)
+{
+	size_t i, j;
+	pthread_t td[50];
+	for (j=0; j<50; j++) {
+		for (i=0; i<sizeof td/sizeof *td; i++)
+			pthread_create(td+i, 0, emptyfunc, 0);
+		for (i=0; i<sizeof td/sizeof *td; i++)
+			pthread_join(td[i], &dummy);
+	}
+	return 0;
+}
+
+size_t b_pthread_create_serial1(void *dummy)
+{
+	size_t i;
+	pthread_attr_t attr;
+	pthread_t td;
+	pthread_attr_init(&attr);
+	pthread_attr_setstacksize(&attr, 16384);
+	for (i=0; i<2500; i++)
+		pthread_create(&td, &attr, emptyfunc, 0);
+	return 0;
+}
+
+void *lockunlock(void *mut)
+{
+	size_t i;
+	for (i=0; i<1000000; i++) {
+		pthread_mutex_lock(mut);
+		pthread_mutex_unlock(mut);
+	}
+	return 0;
+}
+
+size_t b_pthread_uselesslock(void *dummy)
+{
+	pthread_t td;
+	pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER;
+	pthread_create(&td, 0, lockunlock, &mut);
+	pthread_join(td, &dummy);
+	return 0;
+}
+
+size_t b_pthread_createjoin_minimal1(void *dummy)
+{
+	size_t i;
+	pthread_t td;
+	pthread_attr_t a;
+	pthread_attr_init(&a);
+	pthread_attr_setstacksize(&a, sysconf(_SC_PAGESIZE));
+	pthread_attr_setguardsize(&a, 0);
+	for (i=0; i<2500; i++) {
+		pthread_create(&td, &a, emptyfunc, 0);
+		pthread_join(td, &dummy);
+	}
+	return 0;
+}
+
+size_t b_pthread_createjoin_minimal2(void *dummy)
+{
+	size_t i, j;
+	pthread_t td[50];
+	pthread_attr_t a;
+	pthread_attr_init(&a);
+	pthread_attr_setstacksize(&a, sysconf(_SC_PAGESIZE));
+	pthread_attr_setguardsize(&a, 0);
+	for (j=0; j<50; j++) {
+		for (i=0; i<sizeof td/sizeof *td; i++)
+			pthread_create(td+i, &a, emptyfunc, 0);
+		for (i=0; i<sizeof td/sizeof *td; i++)
+			pthread_join(td[i], &dummy);
+	}
+	return 0;
+}
diff --git a/regex.c b/regex.c
new file mode 100644
index 0000000..46cfe37
--- /dev/null
+++ b/regex.c
@@ -0,0 +1,30 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <regex.h>
+#include <locale.h>
+
+size_t b_regex_compile(void *s)
+{
+	regex_t re;
+	size_t i;
+	setlocale(LC_CTYPE, "");
+	for (i=0; i<1000; i++) {
+		regcomp(&re, s, REG_EXTENDED);
+		regfree(&re);
+	}
+}
+
+size_t b_regex_search(void *s)
+{
+	char buf[260000];
+	regex_t re;
+	size_t i;
+	setlocale(LC_CTYPE, "");
+	memset(buf, 'a', sizeof(buf)-2);
+	buf[sizeof buf - 2] = 'b';
+	buf[sizeof buf - 1] = 0;
+	regcomp(&re, s, REG_EXTENDED);
+	regexec(&re, buf, 0, 0, 0);
+	regfree(&re);
+}
diff --git a/stdio.c b/stdio.c
new file mode 100644
index 0000000..0d41f86
--- /dev/null
+++ b/stdio.c
@@ -0,0 +1,35 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+size_t b_stdio_putcgetc(void *dummy)
+{
+	FILE *f = tmpfile();
+	size_t i;
+	size_t cs;
+
+	for (i=0; i<5000000; i++)
+		putc('x', f);
+	fseeko(f, 0, SEEK_SET);
+	for (i=0; i<5000000; i++)
+		cs += getc(f);
+	fclose(f);
+
+	return cs;
+}
+
+size_t b_stdio_putcgetc_unlocked(void *dummy)
+{
+	FILE *f = tmpfile();
+	size_t i;
+	size_t cs;
+
+	for (i=0; i<5000000; i++)
+		putc_unlocked('x', f);
+	fseeko(f, 0, SEEK_SET);
+	for (i=0; i<5000000; i++)
+		cs += getc_unlocked(f);
+	fclose(f);
+
+	return cs;
+}
diff --git a/string.c b/string.c
new file mode 100644
index 0000000..158b828
--- /dev/null
+++ b/string.c
@@ -0,0 +1,68 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define BUFLEN 500000
+
+size_t b_string_strstr(void *dummy)
+{
+	const char *needle = dummy;
+	size_t l = strlen(needle);
+	size_t i;
+	size_t cnt = 10000;
+	size_t cs = 0;
+	char *haystack = malloc(l * cnt + 1);
+	for (i=0; i<cnt-1; i++) {
+		memcpy(haystack + l*i, needle, l);
+		haystack[l*i+l-1] ^= 1;
+	}
+	memcpy(haystack + l*i, needle, l+1);
+	for (i=0; i<50; i++) {
+		haystack[0]^=1;
+		cs += (int)strstr(haystack, needle);
+	}
+	free(haystack);
+	return cs;
+}
+
+size_t b_string_memset(void *dummy)
+{
+	char *buf = malloc(BUFLEN);
+	size_t i;
+	for (i=0; i<100; i++)
+		memset(buf+i, i, BUFLEN-i);
+	free(buf);
+	return 0;
+}
+
+size_t b_string_strchr(void *dummy)
+{
+	char *buf = malloc(BUFLEN);
+	size_t i;
+	size_t cs;
+	memset(buf, 'a', BUFLEN);
+	buf[BUFLEN-1] = 0;
+	buf[BUFLEN-2] = 'b';
+	for (i=0; i<100; i++) {
+		buf[i] = '0'+i%8;
+		cs += (int)strchr(buf, 'b');
+	}
+	free(buf);
+	return cs;
+}
+
+size_t b_string_strlen(void *dummy)
+{
+	char *buf = malloc(BUFLEN);
+	size_t i;
+	size_t cs = 0;
+
+	memset(buf, 'a', BUFLEN-1);
+	buf[BUFLEN-1] = 0;
+	for (i=0; i<100; i++) {
+		buf[i] = '0'+i%8;
+		cs += strlen(buf);
+	}
+	free(buf);
+	return cs;
+}
diff --git a/utf8.c b/utf8.c
new file mode 100644
index 0000000..5a675ed
--- /dev/null
+++ b/utf8.c
@@ -0,0 +1,80 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+#include <locale.h>
+#include <langinfo.h>
+
+size_t b_utf8_bigbuf(void *dummy)
+{
+	char *buf;
+	wchar_t *wbuf;
+	size_t i, j, k, l;
+	size_t cs;
+
+	setlocale(LC_CTYPE, "C.UTF-8")
+	|| setlocale(LC_CTYPE, "en_US.UTF-8")
+	|| setlocale(LC_CTYPE, "en_GB.UTF-8")
+	|| setlocale(LC_CTYPE, "en.UTF-8")
+	|| setlocale(LC_CTYPE, "de_DE-8")
+	|| setlocale(LC_CTYPE, "fr_FR-8");
+	if (strcmp(nl_langinfo(CODESET), "UTF-8")) return -1;
+
+	buf = malloc(500000);
+	wbuf = malloc(500000*sizeof(wchar_t));
+	l = 0;
+	for (i=0xc3; i<0xe0; i++)
+		for (j=0x80; j<0xc0; j++)
+			buf[l++] = i, buf[l++] = j;
+	for (i=0xe1; i<0xed; i++)
+		for (j=0x80; j<0xc0; j++)
+			for (k=0x80; k<0xc0; k++)
+				buf[l++] = i, buf[l++] = j, buf[l++] = k;
+	for (i=0xf1; i<0xf4; i++)
+		for (j=0x80; j<0xc0; j++)
+			for (k=0x80; k<0xc0; k++)
+				buf[l++] = i, buf[l++] = j, buf[l++] = 0x80, buf[l++] = k;
+	buf[l++] = 0;
+	for (i=0; i<50; i++)
+		cs += mbstowcs(wbuf, buf, 500000);
+	free(wbuf);
+	free(buf);
+	return cs;
+}
+
+size_t b_utf8_onebyone(void *dummy)
+{
+	char *buf;
+	wchar_t wc;
+	size_t i, j, k, l;
+	size_t cs;
+	mbstate_t st = {0};
+
+	setlocale(LC_CTYPE, "C.UTF-8")
+	|| setlocale(LC_CTYPE, "en_US.UTF-8")
+	|| setlocale(LC_CTYPE, "en_GB.UTF-8")
+	|| setlocale(LC_CTYPE, "en.UTF-8")
+	|| setlocale(LC_CTYPE, "de_DE-8")
+	|| setlocale(LC_CTYPE, "fr_FR-8");
+	if (strcmp(nl_langinfo(CODESET), "UTF-8")) return -1;
+
+	buf = malloc(500000);
+	l = 0;
+	for (i=0xc3; i<0xe0; i++)
+		for (j=0x80; j<0xc0; j++)
+			buf[l++] = i, buf[l++] = j;
+	for (i=0xe1; i<0xed; i++)
+		for (j=0x80; j<0xc0; j++)
+			for (k=0x80; k<0xc0; k++)
+				buf[l++] = i, buf[l++] = j, buf[l++] = k;
+	for (i=0xf1; i<0xf4; i++)
+		for (j=0x80; j<0xc0; j++)
+			for (k=0x80; k<0xc0; k++)
+				buf[l++] = i, buf[l++] = j, buf[l++] = 0x80, buf[l++] = k;
+	buf[l++] = 0;
+	for (i=0; i<50; i++) {
+		for (j=0; buf[j]; j+=mbrtowc(&wc, buf+j, 4, &st));
+	}
+	free(buf);
+	return cs;
+}
-- 
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